Debt - Schedule of Debt (Details)	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)	Mar. 31, 2022 USD ($)
Short-term debt and current maturities of long-term debt
Commercial paper	$ 392,000,000		$ 362,000,000
Current maturities of long-term debt	245,000,000		249,000,000
Current maturities of finance lease liabilities	267,000,000		289,000,000
Short-term debt and current maturities of long-term debt	904,000,000		900,000,000
Long-term debt, net of current maturities
Finance lease liabilities	588,000,000		643,000,000
Long-term debt	4,386,000,000		4,603,000,000
Less: current maturities	512,000,000		538,000,000
Long-term debt, net of current maturities	3,874,000,000		4,065,000,000
Senior notes
Long-term debt, net of current maturities
Long-term debt, net of current maturities	3,442,000,000		3,575,000,000
Unamortized debt (discount) premiums and deferred debt issuance costs	$ 25,000,000		28,000,000
Finance lease liabilities | Minimum
Debt Information [Abstract]
Effective interest rate	0.23%	0.23%
Finance lease liabilities | Maximum
Debt Information [Abstract]
Effective interest rate	13.84%	13.84%
Borrowings for assets acquired under long-term financing
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 313,000,000		344,000,000
Borrowings for assets acquired under long-term financing | Minimum
Debt Information [Abstract]
Effective interest rate	0.00%	0.00%
Borrowings for assets acquired under long-term financing | Maximum
Debt Information [Abstract]
Effective interest rate	6.78%	6.78%
Mandatorily redeemable preferred stock outstanding
Debt Information [Abstract]
Effective interest rate	6.00%	6.00%
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 63,000,000		63,000,000
Other borrowings
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 5,000,000		6,000,000
Commercial paper
Long-term debt, net of current maturities
Amount of multi-year committed revolving credit facility | €		€ 1,000,000,000
Commercial paper | Minimum
Debt Information [Abstract]
Weighted average interest rate	(0.40%)	(0.40%)
Commercial paper | Maximum
Debt Information [Abstract]
Weighted average interest rate	(0.08%)	(0.08%)
Current maturities of finance lease liabilities | Minimum
Debt Information [Abstract]
Effective interest rate	0.23%	0.23%
Current maturities of finance lease liabilities | Maximum
Debt Information [Abstract]
Effective interest rate	13.84%	13.84%
€650 million Senior notes | Senior notes
Debt Information [Abstract]
Face amount | €		€ 650,000,000
Effective interest rate	1.75%	1.75%
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 677,000,000		720,000,000
$700 million Senior notes | Senior notes
Debt Information [Abstract]
Face amount	$ 700,000,000
Effective interest rate	1.80%	1.80%
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 695,000,000		694,000,000
€750 million Senior notes | Senior notes
Debt Information [Abstract]
Face amount | €		€ 750,000,000
Effective interest rate	0.45%	0.45%
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 779,000,000		828,000,000
$650 million Senior notes | Senior notes
Debt Information [Abstract]
Face amount	$ 650,000,000
Effective interest rate	2.375%	2.375%
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 645,000,000		644,000,000
€600 million Senior notes | Senior notes
Debt Information [Abstract]
Face amount | €		€ 600,000,000
Effective interest rate	0.95%	0.95%
Long-term debt, net of current maturities
Long-term debt, net of current maturities	$ 621,000,000		$ 661,000,000