Stockholders' Equity and Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of and changes in accumulated other comprehensive loss, net of tax
Balance at beginning of the period	$ (471)	$ (440)
Other comprehensive income (loss) before reclassifications	26	(45)
Amounts reclassified from accumulated other comprehensive loss to net earnings	13	14
Other comprehensive income (loss), net of tax	39	(31)
Balance at end of the period	(432)	$ (471)	$ (440)
Common shares repurchased (in shares)		4,069	4,369
Repurchase of common stock		$ 13	$ 17
Cumulative Foreign Currency Translation Adjustment
Components of and changes in accumulated other comprehensive loss, net of tax
Balance at beginning of the period	(376)	(369)
Other comprehensive income (loss) before reclassifications	8	(7)
Other comprehensive income (loss), net of tax	8	(7)
Balance at end of the period	(368)	(376)	(369)
Unrecognized Pension Cost
Components of and changes in accumulated other comprehensive loss, net of tax
Balance at beginning of the period	(95)	(71)
Other comprehensive income (loss) before reclassifications	18	(38)
Amounts reclassified from accumulated other comprehensive loss to net earnings	13	14
Other comprehensive income (loss), net of tax	31	(24)
Balance at end of the period	$ (64)	$ (95)	$ (71)
All components of AOCL except cumulative foreign currency translation adjustments
Components of and changes in accumulated other comprehensive loss, net of tax
Effective income tax rate (as a percent)	25.00%	25.00%	26.00%
Certain subsidiaries
Components of and changes in accumulated other comprehensive loss, net of tax
Unrecognized pension cost related to employees at certain subsidiaries	$ 24	$ 34	$ 21
Certain subsidiaries | Unrecognized Pension Cost
Components of and changes in accumulated other comprehensive loss, net of tax
Tax benefit recorded on unrecognized pension cost	$ 0	$ 0	$ 0