Other Balance Sheet and Statement of Operations Information - Additional Details Related to Certain Balance Sheet Captions (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Other current assets:
Prepaid taxes	$ 125	$ 94
Prepaid expenses	78	91
Capitalized costs to obtain and fulfill sales contracts	92	93
Foreign exchange forwards on certain assets and liabilities	3	31
Derivative instruments designated as accounting hedges	19	0
Other	62	74
Total other current assets	379	383
Other assets:
Investments in non-consolidated affiliates	151	135
Deposits for real-estate leases	14	19
Indemnification assets related to acquisitions	15	15
Mutual funds and fixed deposits	83	66
Company owned life insurance (at contract value)	36	17
Costs to obtain sales contracts	142	134
Cross currency and interest rate swaps	44	57
Pension and other retirement employee benefits	19	21
Other	52	51
Total other assets	556	515
Accounts payable and accrued liabilities:
Salaries and benefits	149	197
Incentive compensation	134	226
Customer credits, advanced payments and advanced billings	60	42
Dividends	5	11
Professional service fees	60	53
Interest accrued on debt	72	82
Accounts payable	18	39
Income taxes	108	128
Pension and other retirement employee benefits	46	45
Accrued royalties	23	19
Foreign exchange forwards on certain assets and liabilities	26	2
Restructuring liability	12	18
Derivative instruments designated as accounting hedges	1	39
Other	102	138
Total accounts payable and accrued liabilities	816	1,039
Other liabilities:
Pension and other retirement employee benefits	211	244
Interest accrued on UTPs	75	113
MAKS indemnification provisions	33	33
Income tax liability - non-current portion	18	18
Derivative instruments designated as accounting hedges	85	145
Other	38	37
Total other liabilities	$ 460	$ 590