Schedule of Segment Reporting Information, by Segment [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, 2025 | Revenues: | | Dx | | BLS | | Intercompany eliminations and other | | LHI | Revenues | | $ | 2,748.8 | | | $ | 784.8 | | | $ | (6.3) | | | $ | 3,527.3 | | | | | | | | | | | Operating Earnings: | | | | | | | | | Labor | | 1,155.1 | | | 302.3 | | | | | | Supplies | | 591.3 | | | 130.8 | | | | | | Shipping costs | | | | 98.2 | | | | | | Depreciation | | 65.4 | | | 29.0 | | | | | | Other operating expenses | | 454.2 | | | 101.2 | | | | | | Segment operating income | | $ | 482.8 | | | $ | 123.3 | | | | | $ | 606.1 | | General corporate and unallocated expenses | | | | | | | | (139.2) | | Amortization of intangibles and other assets | | | | | | | | (68.3) | | Restructuring and other charges | | | | | | | | (4.1) | | | | | | | | | | | Total Operating income | | | | | | | | 394.5 | | Other (expense) income: | | | | | | | | | Interest expense | | | | | | | | (57.1) | | Investment income | | | | | | | | 1.7 | | Equity method loss, net | | | | | | | | (1.7) | | Other, net | | | | | | | | (32.7) | | Earnings from operations before income taxes | | | | | | | | $ | 304.7 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, 2024 | Revenues: | | Dx | | BLS | | Intercompany eliminations and other | | LHI | Revenues | | $ | 2,524.9 | | | $ | 707.0 | | | $ | (11.0) | | | $ | 3,220.9 | | | | | | | | | | | Operating Earnings: | | | | | | | | | Labor | | 1,072.6 | | | 285.7 | | | | | | Supplies | | 544.3 | | | 106.7 | | | | | | Shipping costs | | | | 89.7 | | | | | | Depreciation | | 63.1 | | | 30.3 | | | | | | Other operating expenses | | 403.4 | | | 87.2 | | | | | | Segment operating income | | $ | 441.5 | | | $ | 107.4 | | | | | $ | 548.9 | | General corporate and unallocated expenses | | | | | | | | (180.3) | | Amortization of intangibles and other assets | | | | | | | | (62.2) | | Restructuring and other charges | | | | | | | | (11.6) | | | | | | | | | | | Total Operating income | | | | | | | | 294.8 | | Other (expense) income: | | | | | | | | | Interest expense | | | | | | | | (47.6) | | Investment income | | | | | | | | 1.3 | | Equity method loss, net | | | | | | | | (0.3) | | Other, net | | | | | | | | 19.5 | | Earnings from operations before income taxes | | | | | | | | $ | 267.7 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Six Months Ended June 30, 2025 | Revenues: | | Dx | | BLS | | Intercompany eliminations and other | | LHI | Revenues | | $ | 5,378.4 | | | $ | 1,506.1 | | | $ | (12.1) | | | $ | 6,872.4 | | | | | | | | | | | Operating Earnings: | | | | | | | | | Labor | | 2,278.7 | | | 592.0 | | | | | | Supplies | | 1,177.9 | | | 241.9 | | | | | | Shipping costs | | | | 193.2 | | | | | | Depreciation | | 127.1 | | | 57.6 | | | | | | Other operating expenses | | 884.4 | | | 191.2 | | | | | | Segment operating income | | $ | 910.3 | | | $ | 230.2 | | | | | $ | 1,140.5 | | General corporate and unallocated expenses | | | | | | | | (271.6) | | Amortization of intangibles and other assets | | | | | | | | (137.9) | | Restructuring and other charges | | | | | | | | (10.5) | | | | | | | | | | | Total Operating income | | | | | | | | 720.5 | | Other (expense) income: | | | | | | | | | Interest expense | | | | | | | | (113.1) | | Investment income | | | | | | | | 8.2 | | Equity method loss, net | | | | | | | | (2.0) | | Other, net | | | | | | | | (33.7) | | Earnings from operations before income taxes | | | | | | | | $ | 579.9 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Six Months Ended June 30, 2024 | Revenues: | | Dx | | BLS | | Intercompany eliminations and other | | LHI | Revenues | | $ | 5,004.6 | | | $ | 1,417.9 | | | $ | (25.0) | | | $ | 6,397.5 | | | | | | | | | | | Operating Earnings: | | | | | | | | | Labor | | 2,128.3 | | | 576.1 | | | | | | Supplies | | 1,104.7 | | | 210.2 | | | | | | Shipping costs | | | | 178.1 | | | | | | Depreciation | | 124.8 | | | 61.5 | | | | | | Other operating expenses | | 787.4 | | | 184.7 | | | | | | Segment operating income | | $ | 859.4 | | | $ | 207.3 | | | | | $ | 1,066.7 | | General corporate and unallocated expenses | | | | | | | | (309.2) | | Amortization of intangibles and other assets | | | | | | | | (122.3) | | Restructuring and other charges | | | | | | | | (16.6) | | Goodwill and other asset impairments | | | | | | | | (2.5) | | Total Operating income | | | | | | | | 616.1 | | Other (expense) income: | | | | | | | | | Interest expense | | | | | | | | (94.5) | | Investment income | | | | | | | | 4.2 | | Equity method loss, net | | | | | | | | (0.2) | | Other, net | | | | | | | | 39.5 | | Earnings from operations before income taxes | | | | | | | | $ | 565.1 | |
|