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Financial Risk Management - Summary of Capital Management (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of objectives, policies and processes for managing capital [abstract]
Total liabilities	₩ 23,086,282	₩ 18,289,464
Total equity	12,488,281	14,886,246	₩ 14,981,510	₩ 13,462,388
Cash and deposits in banks	3,414,760	2,443,422
Borrowings (including bonds)	₩ 13,480,889	₩ 8,558,777
Total liabilities to equity ratio	185.00%	123.00%
Net borrowings to equity ratio	81.00%	41.00%

The amount of residual interest in the assets of the entity after deducting all its liabilities.

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- Definition

Expiry date 2020-01-01: The amount of present obligations of the entity arising from past events, the settlement of which is expected to result in an outflow from the entity of resources embodying economic benefits. Effective 2020-01-01: The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

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