Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt - Commercial Paper Program (Details) - USD ($)	6 Months Ended	12 Months Ended
Debt - Commercial Paper Program (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Apr. 30, 2021	Mar. 31, 2021
Debt Instrument
Debt instrument, term	1 month	1 month
Weighted-average interest rate (as a percent)	0.24%	0.30%
Commercial Paper Program
Debt Instrument
Maximum outstanding amount capacity			$ 1,250,000,000	$ 1,000,000,000.0
Borrowings	$ 720,000,000	$ 130,000,000