Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

Revenue Recognition - Impacts of ASC 606 on Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 415	$ 325	$ 300	$ 275
Trade accounts receivable, less allowance for doubtful accounts	1,049	997
Prepaid expenses and other current assets	760	603
Total current assets	2,224	1,975
Property and equipment, net	398	390
Intangible assets, net	2,143	1,882
Goodwill	5,702	5,590	5,373
Contract costs, net	419	84
Other long-term assets	376	368
Total assets	11,262	10,289	9,743
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	1,626	1,359
Current maturities of long-term debt	4	3
Contract liabilities	380
Total current liabilities	2,010	1,938
Long-term debt	5,955	4,897
Deferred income taxes	745	552
Long-term contract liabilities	89	54
Other long-term liabilities	170	117
Total liabilities	8,969	7,558
Total shareholders’ equity	2,293	2,731	$ 2,541	$ 2,660
Total liabilities and shareholders’ equity	11,262	10,289
Adjustments \| Accounting Standards Update 2014-09
Assets
Cash and cash equivalents	0	0
Trade accounts receivable, less allowance for doubtful accounts	(11)
Prepaid expenses and other current assets	19
Total current assets	8
Property and equipment, net	0
Intangible assets, net	0
Goodwill	0
Contract costs, net	(339)
Other long-term assets	102
Total assets	(229)
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	(11)
Current maturities of long-term debt	0
Contract liabilities	101
Total current liabilities	90
Long-term debt	0
Deferred income taxes	(82)
Long-term contract liabilities	21
Other long-term liabilities	0
Total liabilities	29
Total shareholders’ equity	(258)
Total liabilities and shareholders’ equity	(229)
Balances without adoption of ASC 606
Assets
Cash and cash equivalents	415	$ 325
Trade accounts receivable, less allowance for doubtful accounts	1,038
Prepaid expenses and other current assets	779
Total current assets	2,232
Property and equipment, net	398
Intangible assets, net	2,143
Goodwill	5,702
Contract costs, net	80
Other long-term assets	478
Total assets	11,033
Liabilities and Shareholders’ Equity
Accounts payable and accrued expenses	1,615
Current maturities of long-term debt	4
Contract liabilities	481
Total current liabilities	2,100
Long-term debt	5,955
Deferred income taxes	663
Long-term contract liabilities	110
Other long-term liabilities	170
Total liabilities	8,998
Total shareholders’ equity	2,035
Total liabilities and shareholders’ equity	$ 11,033