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Parent Company Only Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 4,654	$ 3,222	$ 1,668
Foreign currency translation adjustment			2
Comprehensive income			1,670
Parent Company [Member]
Net income	4,654	3,222	1,668
Foreign currency translation adjustment	0	0	2
Comprehensive income	$ 4,654	$ 3,222	$ 1,670

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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