ACCUMLATED OTHER COMPREHENSIVE LOSS Items Included in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Beginning balance			$ (1,562)
Other comprehensive income (loss) before reclassifications(1)			135
Amounts reclassified from accumulated other comprehensive loss to earnings(1)(2)			86
Total other comprehensive income (loss)	$ 183	$ 49	221	$ 80
Reclassification of certain tax affects due to tax law changes(3)			(253)
Reclassification of accumulated unrealized gains on available-for-sale securities(4)			(9)
Net amounts reclassified from accumulated other comprehensive loss to retained earnings			(262)
Ending balance	(1,603)		(1,603)
Foreign currency translation adjustments
Beginning balance			264
Other comprehensive income (loss) before reclassifications(1)			(31)
Amounts reclassified from accumulated other comprehensive loss to earnings(1)(2)			0
Total other comprehensive income (loss)			(31)
Reclassification of certain tax affects due to tax law changes(3)			0
Reclassification of accumulated unrealized gains on available-for-sale securities(4)			0
Net amounts reclassified from accumulated other comprehensive loss to retained earnings			0
Ending balance	233		233
Actuarial losses | Pension
Beginning balance			(1,802)
Other comprehensive income (loss) before reclassifications(1)			166
Amounts reclassified from accumulated other comprehensive loss to earnings(1)(2)			85
Total other comprehensive income (loss)			251
Reclassification of certain tax affects due to tax law changes(3)			(245)
Reclassification of accumulated unrealized gains on available-for-sale securities(4)			0
Net amounts reclassified from accumulated other comprehensive loss to retained earnings			(245)
Ending balance	(1,796)		(1,796)
Actuarial losses | Other Postretirement Benefits
Beginning balance			(48)
Other comprehensive income (loss) before reclassifications(1)			0
Amounts reclassified from accumulated other comprehensive loss to earnings(1)(2)			2
Total other comprehensive income (loss)			2
Reclassification of certain tax affects due to tax law changes(3)			(12)
Reclassification of accumulated unrealized gains on available-for-sale securities(4)			0
Net amounts reclassified from accumulated other comprehensive loss to retained earnings			(12)
Ending balance	(58)		(58)
Prior service (costs) credits | Pension
Beginning balance			(8)
Other comprehensive income (loss) before reclassifications(1)			0
Amounts reclassified from accumulated other comprehensive loss to earnings(1)(2)			2
Total other comprehensive income (loss)			2
Reclassification of certain tax affects due to tax law changes(3)			(1)
Reclassification of accumulated unrealized gains on available-for-sale securities(4)			0
Net amounts reclassified from accumulated other comprehensive loss to retained earnings			(1)
Ending balance	(7)		(7)
Prior service (costs) credits | Other Postretirement Benefits
Beginning balance			23
Other comprehensive income (loss) before reclassifications(1)			0
Amounts reclassified from accumulated other comprehensive loss to earnings(1)(2)			(3)
Total other comprehensive income (loss)			(3)
Reclassification of certain tax affects due to tax law changes(3)			5
Reclassification of accumulated unrealized gains on available-for-sale securities(4)			0
Net amounts reclassified from accumulated other comprehensive loss to retained earnings			5
Ending balance	25		25
Unrealized gains on available-for-sale securities
Beginning balance			9
Other comprehensive income (loss) before reclassifications(1)			0
Amounts reclassified from accumulated other comprehensive loss to earnings(1)(2)			0
Total other comprehensive income (loss)			0
Reclassification of certain tax affects due to tax law changes(3)			0
Reclassification of accumulated unrealized gains on available-for-sale securities(4)			(9)
Net amounts reclassified from accumulated other comprehensive loss to retained earnings			(9)
Ending balance	$ 0		$ 0