ACCUMLATED OTHER COMPREHENSIVE LOSS Items Included in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Beginning balance	$ (1,562)
Other comprehensive income (loss) before reclassifications	(5)
Income taxes	(2)
Net other comprehensive income (loss) before reclassifications	(7)
Amounts reclassified from accumulated other comprehensive loss(1)	62
Income taxes	(17)
Net amounts reclassified from accumulated other comprehensive loss to earnings	45
Total other comprehensive income	38	$ 31
Reclassification of certain tax affects due to tax law changes(2)	(253)
Reclassification of accumulated unrealized gains on available-for-sale securities(3)	(9)
Reclassification from accumulated other comprehensive income (loss) to retained earnings	262
Ending balance	(1,786)
Foreign currency translation adjustments
Beginning balance	264
Other comprehensive income (loss) before reclassifications	(15)
Income taxes	0
Net other comprehensive income (loss) before reclassifications	(15)
Amounts reclassified from accumulated other comprehensive loss(1)	0
Income taxes	0
Net amounts reclassified from accumulated other comprehensive loss to earnings	0
Total other comprehensive income	(15)
Reclassification of certain tax affects due to tax law changes(2)	0
Reclassification of accumulated unrealized gains on available-for-sale securities(3)	0
Reclassification from accumulated other comprehensive income (loss) to retained earnings	0
Ending balance	249
Actuarial losses | Pension
Beginning balance	(1,802)
Other comprehensive income (loss) before reclassifications	10
Income taxes	(2)
Net other comprehensive income (loss) before reclassifications	8
Amounts reclassified from accumulated other comprehensive loss(1)	61
Income taxes	(16)
Net amounts reclassified from accumulated other comprehensive loss to earnings	45
Total other comprehensive income	53
Reclassification of certain tax affects due to tax law changes(2)	(245)
Reclassification of accumulated unrealized gains on available-for-sale securities(3)	0
Reclassification from accumulated other comprehensive income (loss) to retained earnings	245
Ending balance	(1,994)
Actuarial losses | Other Postretirement Benefits
Beginning balance	(48)
Other comprehensive income (loss) before reclassifications	0
Income taxes	0
Net other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss(1)	2
Income taxes	(1)
Net amounts reclassified from accumulated other comprehensive loss to earnings	1
Total other comprehensive income	1
Reclassification of certain tax affects due to tax law changes(2)	(12)
Reclassification of accumulated unrealized gains on available-for-sale securities(3)	0
Reclassification from accumulated other comprehensive income (loss) to retained earnings	12
Ending balance	(59)
Prior service (costs) credits | Pension
Beginning balance	(8)
Other comprehensive income (loss) before reclassifications	0
Income taxes	0
Net other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss(1)	1
Income taxes	0
Net amounts reclassified from accumulated other comprehensive loss to earnings	1
Total other comprehensive income	1
Reclassification of certain tax affects due to tax law changes(2)	(1)
Reclassification of accumulated unrealized gains on available-for-sale securities(3)	0
Reclassification from accumulated other comprehensive income (loss) to retained earnings	1
Ending balance	(8)
Prior service (costs) credits | Other Postretirement Benefits
Beginning balance	23
Other comprehensive income (loss) before reclassifications	0
Income taxes	0
Net other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss(1)	(2)
Income taxes	0
Net amounts reclassified from accumulated other comprehensive loss to earnings	(2)
Total other comprehensive income	(2)
Reclassification of certain tax affects due to tax law changes(2)	5
Reclassification of accumulated unrealized gains on available-for-sale securities(3)	0
Reclassification from accumulated other comprehensive income (loss) to retained earnings	(5)
Ending balance	26
Unrealized gains on available-for-sale securities
Beginning balance	9
Other comprehensive income (loss) before reclassifications	0
Income taxes	0
Net other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss(1)	0
Income taxes	0
Net amounts reclassified from accumulated other comprehensive loss to earnings	0
Total other comprehensive income	0
Reclassification of certain tax affects due to tax law changes(2)	0
Reclassification of accumulated unrealized gains on available-for-sale securities(3)	(9)
Reclassification from accumulated other comprehensive income (loss) to retained earnings	9
Ending balance	$ 0