Discontinued Operations - Summary of Held for Sale Assets and Liabilities (Details) - Wireless Network Deployment and Wireline Businesses - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Carrying amounts of assets included as part of discontinued operations:
Accounts receivable, net	$ 5,069	$ 7,633
Unbilled revenue on completed projects	8,078	11,060
Costs in excess of billings on uncompleted projects	10,929	17,632
Inventories	5,303	5,177
Prepaid expenses and other current assets	1,725	247
Property and equipment, net	1,595	2,053
Deposits and other assets	389	196
Goodwill	1,882	1,882
Total assets classified as held for sale in the consolidated balance sheets	34,970	45,880
Carrying amounts of liabilities included as part of discontinued operations:
Accounts payable	19,237	22,138
Accrued expenses	1,633	3,004
Billings in excess of costs on uncompleted projects	1,916	3,131
Deferred rent - short term	67	64
Other non-current liability	308	79
Deferred rent - long term	319	246
Total liabilities classified as held for sale in the consolidated balance sheets	$ 23,480	$ 28,662