Other Comprehensive Income (Loss) - Schedule of Changes in AOCI balance by Components (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 13,160
Other Comprehensive Income (Loss)
Ending Balance	13,581
Accumulated Other Comprehensive (Loss) Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(213)	[1]
Other Comprehensive Income (Loss)
Amounts Reclassified to Net Earnings	2
Tax Expense	(1)
Total Other Comprehensive Income (Loss)	1
Ending Balance	(212)	[1]
Pension and Other Post-Employment Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(337)
Other Comprehensive Income (Loss)
Amounts Reclassified to Net Earnings	4
Tax Expense	(1)
Total Other Comprehensive Income (Loss)	3
Ending Balance	(334)
Interest Rate Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	152
Other Comprehensive Income (Loss)
Amounts Reclassified to Net Earnings	0
Tax Expense	0
Total Other Comprehensive Income (Loss)	0
Ending Balance	152
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(28)
Other Comprehensive Income (Loss)
Amounts Reclassified to Net Earnings	(2)
Tax Expense	0
Total Other Comprehensive Income (Loss)	(2)
Ending Balance	$ (30)

[1] Accumulated Other Comprehensive Loss balances shown above are net of tax. The associated taxes were $58 million as of December 31, 2025, $57 million as of March 31, 2026, $61 million as of December 31, 2024, and $59 million as of March 31, 2025. For additional information, see Note 10, Other Comprehensive Income.