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Stock-Based Compensation - Summary of Stock Options Exercised (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Options exercised (in shares)	470,632	1,171,786	770,597
Total intrinsic value	$ 83	$ 144	$ 86
Cash received upon exercise	42	98	53
Related tax benefits realized	$ 17	$ 29	$ 18

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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