Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended	9 Months Ended
Jul. 01, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020
Investments, Owned, Federal Income Tax Note [Line Items]
Income tax expense (benefit)	$ 191	$ 17	$ (5)	$ 201	$ 8
Effective Income Tax Rate Reconciliation, Percent	6.00%	(189.00%)	10.00%	7.00%	(7.00%)

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration