Financing Arrangements - Commercial paper (Details) - USD ($) $ in Millions	2 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Long-term debt
Payments on debt		$ 342	$ 1,194
Proceeds from borrowings		376	$ 804
Commercial paper
Long-term debt
Maximum aggregate principal amount				$ 1,000
Average amount of commercial paper outstanding	$ 401	$ 489
Weighted average interest rate (as a percent)	0.23%	1.50%
Weighted average maturity	37 days	18 days
Short-term borrowings		$ 622		$ 250
Weighted average interest rate of outstanding balance (as a percent)		3.50%		0.35%
Weighted average maturity of outstanding balance		16 days		40 days