Divestitures - Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2021	Oct. 01, 2020	Mar. 31, 2020	May 31, 2018
Assets:
Total current assets	$ 160		$ 0
Total non-current assets	353		0
Liabilities:
Total current liabilities	118		0
Total long-term liabilities	$ 20		$ 0
HHS Business | Discontinued Operations, Disposed of by Sale
Assets:
Cash and cash equivalents		$ 8
Accounts receivable, net		295
Prepaid expenses		39
Other current assets		2
Total current assets		344
Intangible assets, net		1,308
Operating right-of-use assets, net		74
Goodwill		1,354
Property and equipment, net		46
Other assets		54
Total non-current assets		2,836
Total assets		3,180
Liabilities:
Accounts payable		79
Accrued payroll and related costs		13
Current operating lease liabilities		27
Accrued expenses and other current liabilities		36
Deferred revenue and advance contract payments		20
Total current liabilities		175
Non-current deferred revenue		32
Long-term operating lease liabilities		48
Other long-term liabilities		2
Total long-term liabilities		82
Total liabilities		$ 257
USPS Separation | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Assets:
Cash and cash equivalents				$ 95
Accounts receivable, net				458
Prepaid expenses				82
Other current assets				35
Total current assets				670
Intangible assets, net				870
Goodwill				2,029
Property and equipment, net				294
Other assets				169
Total non-current assets				3,362
Total assets				4,032
Liabilities:
Short-term debt and current maturities of long-term debt				161
Accounts payable				165
Accrued payroll and related costs				17
Accrued expenses and other current liabilities				358
Deferred revenue and advance contract payments				53
Income tax payable				18
Total current liabilities				772
Long-term debt, net of current maturities				1,320
Non-current deferred revenue				5
Non-current income tax liabilities and deferred tax liabilities				196
Other long-term liabilities				71
Total long-term liabilities				1,592
Total liabilities				$ 2,364