XML 267 R86.htm IDEA: XBRL DOCUMENT v3.25.1
Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period $ 1,047 $ 992 $ 1,048
Total other comprehensive (loss) income, net of tax (39) (20) 21
End of period 1,003 1,047 992
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period 10 30 9
OCI, before reclassifications to earnings and income taxes (44) (9) 30
Income taxes 12 1 (8)
OCI before reclassifications to earnings, net of income taxes (32) (8) 22
Amounts reclassified from AOCI to earnings, before income taxes (9) (17) (1)
Income taxes 2 5 0
Amounts reclassified from AOCI to earnings, net of income taxes (7) (12) (1)
Total other comprehensive (loss) income, net of tax (39) (20) 21
End of period (29) 10 30
Post-retirement plans      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period 2 20 9
OCI, before reclassifications to earnings and income taxes (42) (21) 15
Income taxes 11 4 (4)
OCI before reclassifications to earnings, net of income taxes (31) (17) 11
Amounts reclassified from AOCI to earnings, before income taxes 1 (2) 0
Income taxes 0 1 0
Amounts reclassified from AOCI to earnings, net of income taxes 1 (1) 0
Total other comprehensive (loss) income, net of tax (30) (18) 11
End of period (28) 2 20
Derivatives designated as cash flow hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period 8 10 0
OCI, before reclassifications to earnings and income taxes (2) 12 15
Income taxes 1 (3) (4)
OCI before reclassifications to earnings, net of income taxes (1) 9 11
Amounts reclassified from AOCI to earnings, before income taxes (10) (15) (1)
Income taxes 2 4 0
Amounts reclassified from AOCI to earnings, net of income taxes (8) (11) (1)
Total other comprehensive (loss) income, net of tax (9) (2) 10
End of period $ (1) $ 8 $ 10