Subsequent Events (Details) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
Subsequent Events (Details) $ in Millions	Dec. 31, 2026 USD ($)	Sep. 30, 2026 USD ($) employee	Jun. 30, 2026 USD ($) employee	Jun. 30, 2026 USD ($) employee	Jun. 30, 2025 USD ($)	Dec. 31, 2027 USD ($)
Subsequent Event [Line Items]
2026 Charges				$ 141
Net Pension Curtailments and Settlements				0	$ 4
Associate- Related Costs
Subsequent Event [Line Items]
2026 Charges				$ 105
Q1 2026 \| Tall Timbers Mold Plant
Subsequent Event [Line Items]
Number of job reduction \| employee			100	100
2026 Charges			$ 13
Q1 2026 \| Minimum
Subsequent Event [Line Items]
Estimated total pre-tax charges			100
Q1 2026 \| Maximum
Subsequent Event [Line Items]
Estimated total pre-tax charges			$ 110
Q1 2026 \| Employee Severance
Subsequent Event [Line Items]
Number of job reduction \| employee			400	400
Q1 2026 \| Associate- Related Costs \| Minimum
Subsequent Event [Line Items]
2026 Charges			$ 75
Q1 2026 \| Associate- Related Costs \| Maximum
Subsequent Event [Line Items]
2026 Charges			$ 85
September Two Thousand Twenty Six \| Subsequent Event \| Minimum
Subsequent Event [Line Items]
Estimated total pre-tax charges	$ 65	$ 205				$ 535
September Two Thousand Twenty Six \| Subsequent Event \| Maximum
Subsequent Event [Line Items]
Estimated total pre-tax charges	$ 85	$ 225				$ 565
September Two Thousand Twenty Six \| Employee Severance \| Subsequent Event
Subsequent Event [Line Items]
Number of job reduction \| employee		1,750
September Two Thousand Twenty Six \| Associate- Related Costs \| Subsequent Event \| Minimum
Subsequent Event [Line Items]
2026 Charges		$ 190
September Two Thousand Twenty Six \| Associate- Related Costs \| Subsequent Event \| Maximum
Subsequent Event [Line Items]
2026 Charges		210
September Two Thousand Twenty Six \| Other Related Costs \| Subsequent Event \| Minimum
Subsequent Event [Line Items]
Estimated Non-Cash Charges		290
September Two Thousand Twenty Six \| Other Related Costs \| Subsequent Event \| Maximum
Subsequent Event [Line Items]
Estimated Non-Cash Charges		310
September Two Thousand Twenty Six \| Pension and Special Termination Related Costs \| Subsequent Event \| Minimum
Subsequent Event [Line Items]
Net Pension Curtailments and Settlements		40
September Two Thousand Twenty Six \| Pension and Special Termination Related Costs \| Subsequent Event \| Maximum
Subsequent Event [Line Items]
Net Pension Curtailments and Settlements		$ 50