| Segment Reporting [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, 2026 | | | Dx | | BLS | | Intercompany eliminations and other | | LHI | | Revenues: | | | | | | | | | | Revenues | | $ | 2,948.9 | | | $ | 866.7 | | | $ | (5.6) | | | $ | 3,810.0 | | | | | | | | | | | | Operating Earnings: | | | | | | | | | | Labor | | 1,285.5 | | | 319.9 | | | | | | | Supplies | | 635.5 | | | 126.3 | | | | | | | Shipping costs | | | | 130.3 | | | | | | | Depreciation | | 70.8 | | | 28.4 | | | | | | | Other operating expenses | | 465.5 | | | 102.8 | | | | | | | Segment operating income | | $ | 491.6 | | | $ | 159.0 | | | | | $ | 650.6 | | | General corporate and unallocated expenses | | | | | | | | (153.9) | | | Amortization of intangibles and other assets | | | | | | | | (78.7) | | | Restructuring and other charges | | | | | | | | (15.9) | | | | | | | | | | | Total Operating income | | | | | | | | 402.1 | | Other (expense) income: | | | | | | | | | | Interest expense | | | | | | | | (59.1) | | | Investment income | | | | | | | | 1.4 | | | Equity method loss, net | | | | | | | | (11.0) | | | Other, net | | | | | | | | (5.4) | | | Earnings from operations before income taxes | | | | | | | | $ | 328.0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, 2025 | | | Dx | | BLS | | Intercompany eliminations and other | | LHI | | Revenues: | | | | | | | | | | Revenues | | $ | 2,769.6 | | | $ | 799.1 | | | $ | (5.2) | | | $ | 3,563.5 | | | | | | | | | | | | Operating Earnings: | | | | | | | | | | Labor | | 1,200.6 | | | 313.8 | | | | | | | Supplies | | 589.4 | | | 119.5 | | | | | | | Shipping costs | | | | 101.8 | | | | | | | Depreciation | | 66.4 | | | 29.0 | | | | | | | Other operating expenses | | 462.8 | | | 102.8 | | | | | | | Segment operating income | | $ | 450.4 | | | $ | 132.2 | | | | | $ | 582.6 | | | General corporate and unallocated expenses | | | | | | | | (110.6) | | | Amortization of intangibles and other assets | | | | | | | | (69.5) | | | Restructuring and other charges | | | | | | | | (5.9) | | | | | | | | | | | | Total Operating income | | | | | | | | 396.6 | | Other (expense) income: | | | | | | | | | | Interest expense | | | | | | | | (56.0) | | | Investment income | | | | | | | | 3.5 | | | Equity method loss, net | | | | | | | | (5.2) | | | Other, net | | | | | | | | (1.9) | | | Earnings from operations before income taxes | | | | | | | | $ | 337.0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nine Months Ended September 30, 2026 | | | Dx | | BLS | | Intercompany eliminations and other | | LHI | | Revenues: | | | | | | | | | | Revenues | | $ | 8,611.7 | | | $ | 2,483.5 | | | $ | (16.5) | | | $ | 11,078.7 | | | | | | | | | | | | Operating Earnings: | | | | | | | | | | Labor | | 3,697.0 | | | 942.4 | | | | | | | Supplies | | 1,874.1 | | | 378.6 | | | | | | | Shipping costs | | | | 362.9 | | | | | | | Depreciation | | 202.7 | | | 84.7 | | | | | | | Other operating expenses | | 1,365.0 | | | 293.0 | | | | | | | Segment operating income | | $ | 1,472.9 | | | $ | 421.9 | | | | | $ | 1,894.8 | | | General corporate and unallocated expenses | | | | | | | | (400.5) | | | Amortization of intangibles and other assets | | | | | | | | (232.4) | | | Restructuring and other charges | | | | | | | | (27.4) | | | | | | | | | | | | Total Operating income | | | | | | | | 1,234.5 | | | Other (expense) income: | | | | | | | | | | Interest expense | | | | | | | | (175.3) | | | Investment income | | | | | | | | 19.2 | | | Equity method loss, net | | | | | | | | (22.3) | | | Other, net | | | | | | | | (22.0) | | | Earnings from operations before income taxes | | | | | | | | $ | 1,034.1 | | | | | | | | | | | | | Nine Months Ended September 30, 2025 | | | Dx | | BLS | | Intercompany eliminations and other | | LHI | | Revenues: | | | | | | | | | | Revenues | | $ | 8,148.0 | | | $ | 2,305.2 | | | $ | (17.3) | | | $ | 10,435.9 | | | | | | | | | | | | Operating Earnings: | | | | | | | | | | Labor | | 3,479.3 | | | 905.8 | | | | | | | Supplies | | 1,767.3 | | | 361.4 | | | | | | | Shipping costs | | | | 295.0 | | | | | | | Depreciation | | 193.5 | | | 86.6 | | | | | | | Other operating expenses | | 1,347.2 | | | 294.0 | | | | | | | Segment operating income | | $ | 1,360.7 | | | $ | 362.4 | | | | | $ | 1,723.1 | | | General corporate and unallocated expenses | | | | | | | | (382.2) | | | Amortization of intangibles and other assets | | | | | | | | (207.4) | | | Restructuring and other charges | | | | | | | | (16.4) | | | | | | | | | | | | Total Operating income | | | | | | | | 1,117.1 | | | Other (expense) income: | | | | | | | | | | Interest expense | | | | | | | | (169.1) | | | Investment income | | | | | | | | 11.7 | | | Equity method loss, net | | | | | | | | (7.2) | | | Other, net | | | | | | | | (35.6) | | | Earnings from operations before income taxes | | | | | | | | $ | 916.9 | |
|